n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 20 |
4 | 140 |
5 | 1089 |
6 | 8796 |
7 | 72204 |
8 | 596906 |
9 | 4958736 |
10 | 41365110 |
11 | 346477770 |
12 | 2914165157 |
13 | 24612003577 |
14 | 208711039484 |
15 | 1776879432103 |
16 | 15185140895506 |
17 | 130242884479498 |
18 | 1120949733518971 |
19 | 9679158242220797 |
20 | 83836374509942511 |
21 | 728279201686023394 |
22 | 6344019713842496995 |
[1,3,20,140,1089,8796,72204,596906,4958736, 41365110,346477770,2914165157,24612003577, 208711039484,1776879432103,15185140895506, 130242884479498,1120949733518971,9679158242220797, 83836374509942511,728279201686023394, 6344019713842496995] |